Installation of Tekonsha Primus IQ on 2014 Volkswagen Touareg

Question

Question:

Hi, I have a Tekonsha Primus IQ Trailer Brake Controller from a previous vehicle, and trying to install it into a 2014 VW Touareg that has factory tow harness wired. I understand from your great technical posts that I need a 7-PIN mating connector to replace the OEM cap, and also need the 4-PIN VW connector to adapt to the brake controller. My confusion is that there is contradicting information on whether I need to add a relay between the OEM under dash tow connector and PIN 3 of the brake controller?? The video posted shows the Prodigy being installed on the Touareg, presumably without relay. But the Technical Bulletin 2005-Present Touareg states relay is highly encouraged.

asked by: Patrick M

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Expert Reply:

I'll start out by addressing where the confusion comes from- because the Tekonsha Prodigy RF # TK94FR gives off a radio frequency signal to the brakes, it does not require the relay that is required when installing other brake controllers. In order to install the Tekonsha Primus IQ # TK90160 you will need to install a normally open 12v relay, which can be sourced locally, on the brake lamp signal of the adapter wire you use on your 2014 VW Touareg.

If you don't have the towing package on your 2014 VW Touareg you will need some additional parts. To start you'll need to install a 4 way connector using the Tekonsha # 118668, which installs easily by teeing into the plugs behind your vehicle's tail lights. From there, you'll need to add a 7 way connector using the # ETBC7 which will utilize the 4 way you're installing and provide the additional circuits needed for a 7 way connector. If you already have the factory towing package plug but no 7 way connector, you can use the Hopkins # HM40975 to provide you with a plug that is capable of accepting a trailer's 7 way plug.

I've linked the tech bulletin you mentioned in case you need to locate it easily, as well as the installation videos of the wiring harnesses to refer back to.

expert reply by: Erik B

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Answer 1

If your plan was to install a brake controller you'd have to also run the black wire of the 7-Way Adapter part #30717 to the to the positive post of your vehicle battery as well as the ground you mentioned. The Curt Echo part #C51180 that…

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Answer 2

There are very specific instructions for installing a brake controller like the Tekonsha Primus IQ part #TK90160 in your 2013 VW Touareg that has the factory 7-way but there isn't an under the dash connector available. I attached a help…

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Answer 3

Installing the P3 on your 2013 Volkswagen Touareg is possible, however an aftermarket plug-in harness is not available. If the pigtail that you found under your dash is for a brake controller, you will either have to splice the wires from the brake…

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Answer 4

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 5

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 6

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 7

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 8

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 9

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Answer 10

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 11

Class I and Class II hitches both have a 1-1/4 inch receiver opening. The difference is that a Class I hitch has a lower tongue weight rating, usually 200 pounds and a lower towing rating, usually 2,000 pounds. A Class II hitch usually has a tongue…

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Answer 12

I definitely understand being a bit overwhelmed by the amount of options in front of you, however I can definitely help with differentiating the trailer hitches for your 2019 Subaru Outback Wagon along with explaining my personal recommendation,…

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